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Finding the Fourth Proportional to 142,200.80, 213,363.47 and 67,374.42

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Solution

The fourth proportional to 142,200.80, 213,363.47 and 67,374.42 is: 101,091.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,200.80 : 213,363.47 = 67,374.42 : x
  2. Step 2: Convert to fraction form
    142,200.80/213,363.47 = 67,374.42/x
  3. Step 3: Cross multiply
    142,200.80x = 213,363.47 × 67,374.42
  4. Step 4: Simplify right side
    142,200.80x = 14,375,239,703.57
  5. Step 5: Solve for x
    x = 14,375,239,703.57/142,200.80
  6. Step 6: Final answer
    x = 101,091.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.